<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>css优先级</title>
    <link rel="stylesheet" href="./cssrule/b.css">
    <link rel="stylesheet" href="./cssrule/a.css">
    <style>
        .box {
            width: 200px;
            height: 200px;
            border: 1px solid #ddd;
        }

        /* .lightblue {
            background-color: lightblue;
        }

        .gray {
            background-color: gray;
        } */
    </style>
</head>

<body>
    <div class="box gray lightblue">

    </div>
</body>

</html>